嵌入式高精度电源设备控制系统是合肥光源控制系统的重要组成部分,其基本功能是对高精度电源设备及其运行过程进行监控.性能上要求该控制系统的模拟量输入、输出模块的精度和稳定度达到万分之一,软硬件易于扩展,可适应对不同种类高精度电源设备的控制,并且易于接入基于EPICS(experiment physics and industrial control system)的控制系统.嵌入式高精度电源设备控制系统的软硬件是基于EPICS要求进行设计.测试结果表明,该系统所需完成的功能及所要求的性能指标均达到设计要求.该系统已用于控制储存环主磁铁电源和超导Wiggler电源.运行经验显示,该系统运行稳定可靠,操作方便,很好地满足了机器运行和机器研究的需要.
The beam horizontal orbit at Hefei Light Source(HLS)was drifting all along while the storage ring was operating.To study this phenomenon,the displacement and the temperature variation of the BPM chamber were measured.By analyzing the measurement results,the main reason that explained the drifting phenomenon was found. The vacuum chamber following the dipole magnets was heated by the synchrotron light,which caused the increasing of the chamber surface temperature.The variation of the chamber temperature was the main reason why the BPM chamber held the horizontal displacement.To suppress the orbit drifting,a compensation method of BPM movement was proposed and its experimental results were given.
